| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.jelly.tags.swing.model; |
| |
| import javax.swing.table.TableColumn; |
| |
| import org.apache.commons.jelly.JellyContext; |
| import org.apache.commons.jelly.expression.Expression; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| /** |
| * Represents a column in an ExpressionTable |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision: 1.7 $ |
| */ |
| public class ExpressionTableColumn extends TableColumn { |
| |
| /** The Log to which logging calls will be made. */ |
| private static final Log log = LogFactory.getLog( ExpressionTableColumn.class ); |
| |
| private Expression value; |
| private Class type = Object.class; |
| |
| public ExpressionTableColumn() { |
| } |
| |
| public String toString() { |
| return super.toString() + "[value:" + value + "]"; |
| } |
| |
| /** |
| * Evaluates the value of a cell |
| */ |
| public Object evaluateValue(ExpressionTableModel model, Object row, int rowIndex, int columnIndex) { |
| if (value == null) { |
| return null; |
| } |
| // lets put the values in the context |
| JellyContext context = model.getContext(); |
| context.setVariable("rows", model.getRows()); |
| context.setVariable("columns", model.getColumnList()); |
| context.setVariable("row", row); |
| context.setVariable("rowIndex", new Integer(rowIndex)); |
| context.setVariable("columnIndex", new Integer(columnIndex)); |
| |
| // now lets invoke the expression |
| try { |
| return value.evaluateRecurse(context); |
| } |
| catch (RuntimeException e) { |
| log.warn( "Caught exception: " + e + " evaluating: " + value, e ); |
| throw e; |
| } |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Returns the column type. |
| * @return Class |
| */ |
| public Class getType() { |
| return type; |
| } |
| |
| /** |
| * Returns the expression used to extract the value. |
| * @return Expression |
| */ |
| public Expression getValue() { |
| return value; |
| } |
| |
| /** |
| * Sets the expression used to extract the value. |
| * @param type The type to set |
| */ |
| public void setType(Class type) { |
| this.type = type; |
| } |
| |
| /** |
| * Sets the value. |
| * @param value The value to set |
| */ |
| public void setValue(Expression value) { |
| this.value = value; |
| } |
| |
| } |